1/2 cup unsalted butter (1 stick, softened)
1/2 cup dark brown sugar (packed)
1 large egg
1/4 cup molasses
1 tablespoon finely grated and peeled fresh ginger
2 cups whole wheat pastry flour (or unbleached all-purpose flour)
2 tablespoons unsweetened cocoa powder
1 teaspoon baking soda
1/2 tablespoon ground ginger
1 teaspoon ground cinnamon
1/4 teaspoon ground cloves
1/2 teaspoon salt
1/3 cup granulated sugar for rolling cookies